// from https://github.com/github/choosealicense.com/tree/43f355b2819747a1c5d83e0a7debbb0815e73036/_licenses
const CAL_LICENSES = [
  '0bsd',
  'afl-3.0',
  'agpl-3.0',
  'apache-2.0',
  'artistic-2.0',
  'bsd-2-clause',
  'bsd-3-clause-clear',
  'bsd-3-clause',
  'bsd-4-clause',
  'bsl-1.0',
  'cc-by-4.0',
  'cc-by-sa-4.0',
  'cc0-1.0',
  'cecill-2.1',
  'cern-ohl-p-2.0',
  'cern-ohl-s-2.0',
  'cern-ohl-w-2.0',
  'ecl-2.0',
  'epl-1.0',
  'epl-2.0',
  'eupl-1.1',
  'eupl-1.2',
  'gpl-2.0',
  'gpl-3.0',
  'isc',
  'lgpl-2.1',
  'lgpl-3.0',
  'lppl-1.3c',
  'mit',
  'mit-0',
  'mpl-2.0',
  'ms-pl',
  'ms-rl',
  'mulanpsl-2.0',
  'ncsa',
  'odbl-1.0',
  'ofl-1.1',
  'osl-3.0',
  'postgresql',
  'unlicense',
  'upl-1.0',
  'vim',
  'wtfpl',
  'zlib',
];

// from https://github.com/spdx/license-list-data/blob/1e34565178429dc5a10bd85fd02f4e2946b856b0/json/licenses.json
// <licenses.json jq '.licenses[] | select(.isDeprecatedLicenseId | not).licenseId'
const SPDX_LICENSES = [
  '0BSD',
  'AAL',
  'ADSL',
  'AFL-1.1',
  'AFL-1.2',
  'AFL-2.0',
  'AFL-2.1',
  'AFL-3.0',
  'AGPL-1.0-only',
  'AGPL-1.0-or-later',
  'AGPL-3.0-only',
  'AGPL-3.0-or-later',
  'AMDPLPA',
  'AML',
  'AMPAS',
  'ANTLR-PD',
  'ANTLR-PD-fallback',
  'APAFML',
  'APL-1.0',
  'APSL-1.0',
  'APSL-1.1',
  'APSL-1.2',
  'APSL-2.0',
  'Abstyles',
  'Adobe-2006',
  'Adobe-Glyph',
  'Afmparse',
  'Aladdin',
  'Apache-1.0',
  'Apache-1.1',
  'Apache-2.0',
  'App-s2p',
  'Arphic-1999',
  'Artistic-1.0',
  'Artistic-1.0-Perl',
  'Artistic-1.0-cl8',
  'Artistic-2.0',
  'BSD-1-Clause',
  'BSD-2-Clause',
  'BSD-2-Clause-Patent',
  'BSD-2-Clause-Views',
  'BSD-3-Clause',
  'BSD-3-Clause-Attribution',
  'BSD-3-Clause-Clear',
  'BSD-3-Clause-LBNL',
  'BSD-3-Clause-Modification',
  'BSD-3-Clause-No-Military-License',
  'BSD-3-Clause-No-Nuclear-License',
  'BSD-3-Clause-No-Nuclear-License-2014',
  'BSD-3-Clause-No-Nuclear-Warranty',
  'BSD-3-Clause-Open-MPI',
  'BSD-4-Clause',
  'BSD-4-Clause-Shortened',
  'BSD-4-Clause-UC',
  'BSD-Protection',
  'BSD-Source-Code',
  'BSL-1.0',
  'BUSL-1.1',
  'Baekmuk',
  'Bahyph',
  'Barr',
  'Beerware',
  'BitTorrent-1.0',
  'BitTorrent-1.1',
  'Bitstream-Vera',
  'BlueOak-1.0.0',
  'Borceux',
  'C-UDA-1.0',
  'CAL-1.0',
  'CAL-1.0-Combined-Work-Exception',
  'CATOSL-1.1',
  'CC-BY-1.0',
  'CC-BY-2.0',
  'CC-BY-2.5',
  'CC-BY-2.5-AU',
  'CC-BY-3.0',
  'CC-BY-3.0-AT',
  'CC-BY-3.0-DE',
  'CC-BY-3.0-NL',
  'CC-BY-3.0-US',
  'CC-BY-4.0',
  'CC-BY-NC-1.0',
  'CC-BY-NC-2.0',
  'CC-BY-NC-2.5',
  'CC-BY-NC-3.0',
  'CC-BY-NC-3.0-DE',
  'CC-BY-NC-4.0',
  'CC-BY-NC-ND-1.0',
  'CC-BY-NC-ND-2.0',
  'CC-BY-NC-ND-2.5',
  'CC-BY-NC-ND-3.0',
  'CC-BY-NC-ND-3.0-DE',
  'CC-BY-NC-ND-3.0-IGO',
  'CC-BY-NC-ND-4.0',
  'CC-BY-NC-SA-1.0',
  'CC-BY-NC-SA-2.0',
  'CC-BY-NC-SA-2.0-FR',
  'CC-BY-NC-SA-2.0-UK',
  'CC-BY-NC-SA-2.5',
  'CC-BY-NC-SA-3.0',
  'CC-BY-NC-SA-3.0-DE',
  'CC-BY-NC-SA-3.0-IGO',
  'CC-BY-NC-SA-4.0',
  'CC-BY-ND-1.0',
  'CC-BY-ND-2.0',
  'CC-BY-ND-2.5',
  'CC-BY-ND-3.0',
  'CC-BY-ND-3.0-DE',
  'CC-BY-ND-4.0',
  'CC-BY-SA-1.0',
  'CC-BY-SA-2.0',
  'CC-BY-SA-2.0-UK',
  'CC-BY-SA-2.1-JP',
  'CC-BY-SA-2.5',
  'CC-BY-SA-3.0',
  'CC-BY-SA-3.0-AT',
  'CC-BY-SA-3.0-DE',
  'CC-BY-SA-4.0',
  'CC-PDDC',
  'CC0-1.0',
  'CDDL-1.0',
  'CDDL-1.1',
  'CDL-1.0',
  'CDLA-Permissive-1.0',
  'CDLA-Permissive-2.0',
  'CDLA-Sharing-1.0',
  'CECILL-1.0',
  'CECILL-1.1',
  'CECILL-2.0',
  'CECILL-2.1',
  'CECILL-B',
  'CECILL-C',
  'CERN-OHL-1.1',
  'CERN-OHL-1.2',
  'CERN-OHL-P-2.0',
  'CERN-OHL-S-2.0',
  'CERN-OHL-W-2.0',
  'CNRI-Jython',
  'CNRI-Python',
  'CNRI-Python-GPL-Compatible',
  'COIL-1.0',
  'CPAL-1.0',
  'CPL-1.0',
  'CPOL-1.02',
  'CUA-OPL-1.0',
  'Caldera',
  'ClArtistic',
  'Community-Spec-1.0',
  'Condor-1.1',
  'Crossword',
  'CrystalStacker',
  'Cube',
  'D-FSL-1.0',
  'DL-DE-BY-2.0',
  'DOC',
  'DRL-1.0',
  'DSDP',
  'Dotseqn',
  'ECL-1.0',
  'ECL-2.0',
  'EFL-1.0',
  'EFL-2.0',
  'EPICS',
  'EPL-1.0',
  'EPL-2.0',
  'EUDatagrid',
  'EUPL-1.0',
  'EUPL-1.1',
  'EUPL-1.2',
  'Elastic-2.0',
  'Entessa',
  'ErlPL-1.1',
  'Eurosym',
  'FDK-AAC',
  'FSFAP',
  'FSFUL',
  'FSFULLR',
  'FTL',
  'Fair',
  'Frameworx-1.0',
  'FreeBSD-DOC',
  'FreeImage',
  'GD',
  'GFDL-1.1-invariants-only',
  'GFDL-1.1-invariants-or-later',
  'GFDL-1.1-no-invariants-only',
  'GFDL-1.1-no-invariants-or-later',
  'GFDL-1.1-only',
  'GFDL-1.1-or-later',
  'GFDL-1.2-invariants-only',
  'GFDL-1.2-invariants-or-later',
  'GFDL-1.2-no-invariants-only',
  'GFDL-1.2-no-invariants-or-later',
  'GFDL-1.2-only',
  'GFDL-1.2-or-later',
  'GFDL-1.3-invariants-only',
  'GFDL-1.3-invariants-or-later',
  'GFDL-1.3-no-invariants-only',
  'GFDL-1.3-no-invariants-or-later',
  'GFDL-1.3-only',
  'GFDL-1.3-or-later',
  'GL2PS',
  'GLWTPL',
  'GPL-1.0-only',
  'GPL-1.0-or-later',
  'GPL-2.0-only',
  'GPL-2.0-or-later',
  'GPL-3.0-only',
  'GPL-3.0-or-later',
  'Giftware',
  'Glide',
  'Glulxe',
  'HPND',
  'HPND-sell-variant',
  'HTMLTIDY',
  'HaskellReport',
  'Hippocratic-2.1',
  'IBM-pibs',
  'ICU',
  'IJG',
  'IPA',
  'IPL-1.0',
  'ISC',
  'ImageMagick',
  'Imlib2',
  'Info-ZIP',
  'Intel',
  'Intel-ACPI',
  'Interbase-1.0',
  'JPNIC',
  'JSON',
  'Jam',
  'JasPer-2.0',
  'LAL-1.2',
  'LAL-1.3',
  'LGPL-2.0-only',
  'LGPL-2.0-or-later',
  'LGPL-2.1-only',
  'LGPL-2.1-or-later',
  'LGPL-3.0-only',
  'LGPL-3.0-or-later',
  'LGPLLR',
  'LPL-1.0',
  'LPL-1.02',
  'LPPL-1.0',
  'LPPL-1.1',
  'LPPL-1.2',
  'LPPL-1.3a',
  'LPPL-1.3c',
  'Latex2e',
  'Leptonica',
  'LiLiQ-P-1.1',
  'LiLiQ-R-1.1',
  'LiLiQ-Rplus-1.1',
  'Libpng',
  'Linux-OpenIB',
  'Linux-man-pages-copyleft',
  'MIT',
  'MIT-0',
  'MIT-CMU',
  'MIT-Modern-Variant',
  'MIT-advertising',
  'MIT-enna',
  'MIT-feh',
  'MIT-open-group',
  'MITNFA',
  'MPL-1.0',
  'MPL-1.1',
  'MPL-2.0',
  'MPL-2.0-no-copyleft-exception',
  'MS-PL',
  'MS-RL',
  'MTLL',
  'MakeIndex',
  'Minpack',
  'MirOS',
  'Motosoto',
  'MulanPSL-1.0',
  'MulanPSL-2.0',
  'Multics',
  'Mup',
  'NAIST-2003',
  'NASA-1.3',
  'NBPL-1.0',
  'NCGL-UK-2.0',
  'NCSA',
  'NGPL',
  'NIST-PD',
  'NIST-PD-fallback',
  'NLOD-1.0',
  'NLOD-2.0',
  'NLPL',
  'NOSL',
  'NPL-1.0',
  'NPL-1.1',
  'NPOSL-3.0',
  'NRL',
  'NTP',
  'NTP-0',
  'Naumen',
  'Net-SNMP',
  'NetCDF',
  'Newsletr',
  'Nokia',
  'Noweb',
  'O-UDA-1.0',
  'OCCT-PL',
  'OCLC-2.0',
  'ODC-By-1.0',
  'ODbL-1.0',
  'OFL-1.0',
  'OFL-1.0-RFN',
  'OFL-1.0-no-RFN',
  'OFL-1.1',
  'OFL-1.1-RFN',
  'OFL-1.1-no-RFN',
  'OGC-1.0',
  'OGDL-Taiwan-1.0',
  'OGL-Canada-2.0',
  'OGL-UK-1.0',
  'OGL-UK-2.0',
  'OGL-UK-3.0',
  'OGTSL',
  'OLDAP-1.1',
  'OLDAP-1.2',
  'OLDAP-1.3',
  'OLDAP-1.4',
  'OLDAP-2.0',
  'OLDAP-2.0.1',
  'OLDAP-2.1',
  'OLDAP-2.2',
  'OLDAP-2.2.1',
  'OLDAP-2.2.2',
  'OLDAP-2.3',
  'OLDAP-2.4',
  'OLDAP-2.5',
  'OLDAP-2.6',
  'OLDAP-2.7',
  'OLDAP-2.8',
  'OML',
  'OPL-1.0',
  'OPUBL-1.0',
  'OSET-PL-2.1',
  'OSL-1.0',
  'OSL-1.1',
  'OSL-2.0',
  'OSL-2.1',
  'OSL-3.0',
  'OpenSSL',
  'PDDL-1.0',
  'PHP-3.0',
  'PHP-3.01',
  'PSF-2.0',
  'Parity-6.0.0',
  'Parity-7.0.0',
  'Plexus',
  'PolyForm-Noncommercial-1.0.0',
  'PolyForm-Small-Business-1.0.0',
  'PostgreSQL',
  'Python-2.0',
  'QPL-1.0',
  'Qhull',
  'RHeCos-1.1',
  'RPL-1.1',
  'RPL-1.5',
  'RPSL-1.0',
  'RSA-MD',
  'RSCPL',
  'Rdisc',
  'Ruby',
  'SAX-PD',
  'SCEA',
  'SGI-B-1.0',
  'SGI-B-1.1',
  'SGI-B-2.0',
  'SHL-0.5',
  'SHL-0.51',
  'SISSL',
  'SISSL-1.2',
  'SMLNJ',
  'SMPPL',
  'SNIA',
  'SPL-1.0',
  'SSH-OpenSSH',
  'SSH-short',
  'SSPL-1.0',
  'SWL',
  'Saxpath',
  'SchemeReport',
  'Sendmail',
  'Sendmail-8.23',
  'SimPL-2.0',
  'Sleepycat',
  'Spencer-86',
  'Spencer-94',
  'Spencer-99',
  'SugarCRM-1.1.3',
  'TAPR-OHL-1.0',
  'TCL',
  'TCP-wrappers',
  'TMate',
  'TORQUE-1.1',
  'TOSL',
  'TU-Berlin-1.0',
  'TU-Berlin-2.0',
  'UCL-1.0',
  'UPL-1.0',
  'Unicode-DFS-2015',
  'Unicode-DFS-2016',
  'Unicode-TOU',
  'Unlicense',
  'VOSTROM',
  'VSL-1.0',
  'Vim',
  'W3C',
  'W3C-19980720',
  'W3C-20150513',
  'WTFPL',
  'Watcom-1.0',
  'Wsuipa',
  'X11',
  'X11-distribute-modifications-variant',
  'XFree86-1.1',
  'XSkat',
  'Xerox',
  'Xnet',
  'YPL-1.0',
  'YPL-1.1',
  'ZPL-1.1',
  'ZPL-2.0',
  'ZPL-2.1',
  'Zed',
  'Zend-2.0',
  'Zimbra-1.3',
  'Zimbra-1.4',
  'Zlib',
  'blessing',
  'bzip2-1.0.6',
  'copyleft-next-0.3.0',
  'copyleft-next-0.3.1',
  'curl',
  'diffmark',
  'dvipdfm',
  'eGenix',
  'etalab-2.0',
  'gSOAP-1.3b',
  'gnuplot',
  'iMatix',
  'libpng-2.0',
  'libselinux-1.0',
  'libtiff',
  'mpich2',
  'mplus',
  'psfrag',
  'psutils',
  'xinetd',
  'xpp',
  'zlib-acknowledgement',
];

// from https://github.com/spdx/license-list-data/blob/1e34565178429dc5a10bd85fd02f4e2946b856b0/json/exceptions.json
// <exceptions.json jq '.exceptions[] | select(.isDeprecatedLicenseId | not).licenseExceptionId'
const SPDX_EXCEPTIONS = [
  '389-exception',
  'Autoconf-exception-2.0',
  'Autoconf-exception-3.0',
  'Bison-exception-2.2',
  'Bootloader-exception',
  'CLISP-exception-2.0',
  'Classpath-exception-2.0',
  'DigiRule-FOSS-exception',
  'FLTK-exception',
  'Fawkes-Runtime-exception',
  'Font-exception-2.0',
  'GCC-exception-2.0',
  'GCC-exception-3.1',
  'GPL-3.0-linking-exception',
  'GPL-3.0-linking-source-exception',
  'GPL-CC-1.0',
  'GStreamer-exception-2005',
  'GStreamer-exception-2008',
  'KiCad-libraries-exception',
  'LGPL-3.0-linking-exception',
  'LLVM-exception',
  'LZMA-exception',
  'Libtool-exception',
  'Linux-syscall-note',
  'OCCT-exception-1.0',
  'OCaml-LGPL-linking-exception',
  'OpenJDK-assembly-exception-1.0',
  'PS-or-PDF-font-exception-20170817',
  'Qt-GPL-exception-1.0',
  'Qt-LGPL-exception-1.1',
  'Qwt-exception-1.0',
  'SHL-2.0',
  'SHL-2.1',
  'Swift-exception',
  'Universal-FOSS-exception-1.0',
  'WxWindows-exception-3.1',
  'eCos-exception-2.0',
  'freertos-exception-2.0',
  'gnu-javamail-exception',
  'i2p-gpl-java-exception',
  'mif-exception',
  'openvpn-openssl-exception',
  'u-boot-exception-2.0',
];

const LICENSE_KEYWORDS = new Set(['OR', 'AND', 'WITH', '(', ')']);

export function parseLicense(text) {
  return text
    .trim()
    .replace(/\//g, ' OR ')
    .replace(/(^\(| \()/g, ' ( ')
    .replace(/(\)$|\) )/g, ' ) ')
    .replace(/ +/g, ' ')
    .split(' ')
    .filter(Boolean)
    .map(text => {
      let isKeyword = LICENSE_KEYWORDS.has(text);
      let link = isKeyword ? undefined : licenseLink(text);
      return { isKeyword, text, link };
    });
}

function licenseLink(text) {
  let lowerCaseText = text.toLowerCase();

  let calLicense = CAL_LICENSES.find(it => it === lowerCaseText);
  if (calLicense) {
    return `https://choosealicense.com/licenses/${calLicense}`;
  }

  let spdxMatch =
    SPDX_LICENSES.find(it => it.toLowerCase() === lowerCaseText) ||
    SPDX_EXCEPTIONS.find(it => it.toLowerCase() === lowerCaseText);

  if (spdxMatch) {
    return `https://spdx.org/licenses/${spdxMatch}.html`;
  }
}
